Dibenz[a,h]acridine

**Semantic type:** Hazardous or Poisonous Substance

**Definition:** A aromatic hydrocarbon consisting of five fused rings formed during the incomplete burning of organic matter. Benz[a,h]acridine is primarily found in petroleum refinery incinerator emissions, coal combustion emissions, cigarette smoke and coal tar pitch. This substance is used only for research purposes. Benzo[a,h]acridine is reasonably anticipated to be a human carcinogen. (NCI05)

**Synonyms:** - 1,2,5,6-Dibenzacridine - 1,2,5,6-Dinaphthacridine - 7-Azadibenz(a,h)anthracene - DB(a,h)AC - DIBENZ(A,H)ACRIDINE - Dibenz(a,d)acridine